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Electronics Engineering Objective Questions { Diode Circuits  }



176. The device associated with voltage-controlled capacitance is a
A. LED
B. photo-diode
C. varactor diode
D. Zener diode
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177. The varactor is usually
A. forward-biased
B. reverse-biased
C. unbiased
D. in the breakdown region
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178. When the light increases, the reverse current in a photo-diode
A. increases
B. decreases
C. is unaffected
D. none of the above
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179. To display the digit 0 in a seven segment display
A. A must be lighted
B. F must be off
C. G must be on
D. all segments except G should be lighted
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180. In an unregulated power supply, if load current increases, the output voltage
A. remains the same
B. decreases
C. increases
D. none of the above
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181. In an unregulated power supply, if input a.c. voltage increases, the output voltage
A. increases
B. decreases
C. remains the same
D. none of the above
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182. A power supply which has a voltage regulation of is unregulated power supply.
A.0%
B.0.50%
C.10%
D.0.80%
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